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Python / subprocess > Symbolic link先のファイル名だけ取得する実装 > os.readlink()を教えていただきました

Last updated at Posted at 2017-03-24
動作環境
Xeon E5-2620 v4 (8コア) x 2
32GB RAM
CentOS 6.8 (64bit)
openmpi-1.8.x86_64 とその-devel
mpich.x86_64 3.1-5.el6とその-devel
gcc version 4.4.7 (とgfortran)
NCAR Command Language Version 6.3.0
WRF v3.7.1を使用。
Python 3.6.0 on virtualenv
$ touch test_original_170324
$ ln -fs test_original_170324 LN_link_170324
$ ls -l LN_link_170324 
lrwxrwxrwx 1 user user 20 Mar 24 16:06 LN_link_170324 -> test_original_170324

LN_link_170324の元リンクファイルであるtest_original_170324をPython scriptから取得したい。

参考 python3で外部のシェルスクリプト(ls)とかの返り値を取得
参考 https://docs.python.jp/3/library/subprocess.html

test_python_170324j.py
from subprocess import getoutput

# Python 3.6.0 on virtualenv

cmd = 'ls -l LN_link_170324'
last = getoutput(cmd).split(' ')[-1]
print(last)
結果
$ python test_python_170324j.py 
test_original_170324

教えたいただいた事項

(追記 2017/03/25)

@komeda-shinjiさんにコメントにてos.readlink()を教えていただきました。

情報感謝です。

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